package 多线程.Test;

/**
 * 银行账户类
 */
class Account {
   String name;
   float amount;
 
   public Account(String name, float amount) {
      this.name = name;
      this.amount = amount;
   }
   //存钱
   public  void deposit(float amt) {
      amount += amt;
      try {
         Thread.sleep(100);
      } catch (InterruptedException e) {
         e.printStackTrace();
      }
   }
   //取钱
   public  void withdraw(float amt) {
      amount -= amt;
      try {
         Thread.sleep(100);
      } catch (InterruptedException e) {
         e.printStackTrace();
      }
   }
 
   public float getBalance() {
      return amount;
   }
}
 
/**
 * 账户操作类
 */
class AccountOperator implements Runnable{
   private Account account;
   public AccountOperator(Account account) {
      this.account = account;
   }
 
   public void run() {
      synchronized (account) {
         account.deposit(500);
         account.withdraw(500);
         System.out.println(Thread.currentThread().getName() + ":" + account.getBalance());
      }
   }
}
 
public class Demo02{
    
    //public static final Object signal = new Object(); // 线程间通信变量
    //将account改为Demo00.signal也能实现线程同步
    public static void main(String args[]){
        Account account = new Account("zhang san", 10000.0f);
        AccountOperator accountOperator = new AccountOperator(account);
 
        final int THREAD_NUM = 5;
        Thread[] threads = new Thread[THREAD_NUM];
        for (int i = 0; i < THREAD_NUM; i ++) {
           threads[i] = new Thread(accountOperator, "Thread" + i);
           threads[i].start();
        }
    }
}